export default  {
	"title": '操作系统_在线2',
	"testId": '149477',
	"praxiseList": [
		{
			"id": 219734,
			"title": "在操作系统中，（  ）指的是一种硬件机制。",
			"options": "[\"通道技术\",\"缓冲池\",\"SPOOLING技术\",\"内存覆盖技术\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219735,
			"title": "在存储管理中，采用覆盖与交换技术的目的是",
			"options": "[\"节省主存空间\",\"物理上扩充主存容量\",\"提高CPU的效率\",\"实现主存共享\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219736,
			"title": "在多级目录结构中，要访问一个文件时，必须指出文件的",
			"options": "[\"父目录\",\"当前目录\",\"路径名\",\"根目录\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219737,
			"title": "可变分区存储管理系统中，若采用最佳适应分配算法，“空闲区表”中的空闲区可按（  ）顺序排列。",
			"options": "[\"长度递增\",\"长度递减\",\"地址递增\",\"地址递减\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219738,
			"title": "动态重定位技术依赖于",
			"options": "[\"重定位装入程序\",\"重定位寄存器\",\"地址结构\",\"目标程序\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219739,
			"title": "分页式存储管理的主要特点是",
			"options": "[\"要求处理缺页中断\",\"要求扩充主存容量\",\"不要求作业装入到主存的连续区域\",\"不要求作业全部同时装人主存\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219740,
			"title": "从用户的角度看，引入文件系统的主要目的是",
			"options": "[\"实现虚拟存储\",\"保存系统文档\",\"保存拥护和系统文档\",\"实现对文件的按名存取\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219741,
			"title": "为了解决不同用户文件的“命名冲突”问题，通常在文件系统中采用",
			"options": "[\"约定方法\",\"多级目录\",\"路径\",\"索引\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219742,
			"title": "LRU页面调度算法淘汰（  ）的页",
			"options": "[\"最近最少使用\",\"最近最久未使用\",\"最先进入主存\",\"将来最久使用\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219743,
			"title": "CPU输出数据的速度远远高于打印机的打印速度，为解决这一矛盾，可采用",
			"options": "[\"并行技术\",\"通道技术\",\"缓冲技术\",\"虚拟存储技术\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219744,
			"title": "（  ）算法是设备分配常用的一种算法。",
			"options": "[\"短作用优先\",\"最佳适应\",\"首次适应\",\"先来先服务\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219745,
			"title": "银行家算法是一种(    )算法。",
			"options": "[\"死锁解除\",\"死锁避免\",\"死锁预防\",\"死锁检测\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219746,
			"title": "逻辑文件存放在磁带上应组织成",
			"options": "[\"索引文许\",\"直接文件\",\"顺序文件\",\"链接文件\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219747,
			"title": "资源的按序分配策略可以破坏(    )条件。",
			"options": "[\"互斥使用资源\",\"占用且等待资源\",\"非抢夺资源\",\"循环等待资源\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219748,
			"title": "虚拟存储器实际容量受（ ）限制",
			"options": "[\"物理主存的大小\",\"计算机的地址结构\",\"磁盘容量\",\"数据存放的绝对地址\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219749,
			"title": "缓冲技术中的缓冲池在（ ）中",
			"options": "[\"外存\",\"内存\",\"ROM\",\"寄存器\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219750,
			"title": "文件系统中用（    ）管理文件",
			"options": "[\"作业控制块\",\"外页表\",\"目录\",\"软硬件结合的方法\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219751,
			"title": "操作系统的基本类型主要有",
			"options": "[\"批处理系统、分时系统及多任务系统\",\"实时系统、批处理系统及分时操作系统\",\"单用户系统、多用户系统及批处理系统\",\"实时系统、分时系统、多用户系统\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219752,
			"title": "操作系统的(   )管理部分负责对进程进行调度",
			"options": "[\"主存储器\",\"控制器\",\"运算器\",\"处理机\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219753,
			"title": "操作系统是对(  )进行管理的软件",
			"options": "[\"软件\",\"硬件\",\"计算机资源\",\"应用程序\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219754,
			"title": "磁盘上的文件目录由若干目录项组成,目录项中不应该包含_________。",
			"options": "[\"文件在内存地址\",\"文件名\",\"存取权限\",\"文件的建立日期\",\"在磁盘的存放地址\"]",
			"answer": "[2,3,4,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3,4,5]"
		},
		{
			"id": 219755,
			"title": "磁盘上一物理块的位置可由参数_________确定。",
			"options": "[\"字节号\",\"柱面号\",\"扇区号\",\"磁头号\",\"缓存地址\"]",
			"answer": "[2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3,4]"
		},
		{
			"id": 219756,
			"title": "文件系统应具有的功能包括_________。",
			"options": "[\"实现“按名存取”外存上的文件\",\"分配文件的存储空间\",\"实现文件目录管理\",\"提供合适的存取方法以适应各种不同的应用\",\"实现文件的共享、保护和保密\"]",
			"answer": "[1,2,3,4,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,2,3,4,5]"
		},
		{
			"id": 219757,
			"title": "文件在相应存储介质上的组织方式也有差异。通常文件的存储结构有_________。",
			"options": "[\"流式结构\",\"顺序结构\",\"链接结构\",\"记录式结构\",\"索引结构\"]",
			"answer": "[2,3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3,5]"
		},
		{
			"id": 219758,
			"title": "如果按文件的用途来分类,可将文件分为_________。",
			"options": "[\"系统文件\",\"永久文件\",\"用户文件\",\"逻辑文件\",\"库文件\"]",
			"answer": "[1,3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,3,5]"
		},
		{
			"id": 219759,
			"title": "在批处理系统中,提交的一个作业中应包含_________。",
			"options": "[\"作业说明书\",\"程序\",\"进程控制块\",\"PCB\",\"数据\"]",
			"answer": "[1,2,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,2,5]"
		},
		{
			"id": 219760,
			"title": "可以解决文件重名问题的目录结构有_________。",
			"options": "[\"一级目录\",\"二级目录\",\"三级目录\",\"多级目录\",\"树形结构目录\"]",
			"answer": "[2,3,4,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3,4,5]"
		},
		{
			"id": 219761,
			"title": "关于操作系统的叙述_________是正确的。",
			"options": "[\"操作系统是管理资源的程序\",\"操作系统是管理用户程序执行的程序\",\"操作系统是能使系统资源提高效率的程序\",\"操作系统是能方便用户编程的程序\",\"操作系统是能方便用户使用计算机的程序\"]",
			"answer": "[1,2,3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,2,3,5]"
		},
		{
			"id": 219762,
			"title": "以下有关文件的叙述中错误的是_________。",
			"options": "[\"索引文件结构是既可以满足文件动态增长的要求，又可以较为方便和迅速地实现随机存取的文件结构\",\"串联文件结构不仅适合于顺序存取，而且也适合于随机存取\",\"在文件存储空间的管理中，如果采用空闲块链法，对于空闲块的分配和回收可以同时进行，以提高效率\",\"一般来说，在一级文件目录结构中，目录表是存放在内存中的\",\"顺序存取方法是按记录的编号来存取文件任一记录的\"]",
			"answer": "[2,3,4,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3,4,5]"
		},
		{
			"id": 219763,
			"title": "以下有关文件的叙述中正确的是_________。",
			"options": "[\"为文件设置口令可实现对文件的保密\",\"删除文件就意味着需删除文件在内存中的有关说明信息\",\"计算机组织、存取和保存信息是通过文件系统实现的\",\"文件的透明存取，使用户既可以看到文件的逻辑结构，又可以知道它的物理结构和查找方法\",\"UNIX操作系统和 MS-DOS等都采用无结构(流式)文件\"]",
			"answer": "[1,3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,3,5]"
		},
		{
			"id": 219764,
			"title": "虚拟存储系统可以在每一台计算机上实现. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219765,
			"title": "用户 程序有时也可以在核心态下运行. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219766,
			"title": "流式文件是指无结构的文件. (   )",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219767,
			"title": "操作系统的所有程序都必须常驻内存.(   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219768,
			"title": "执行系统调用时可以被中断. (   )",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219769,
			"title": "所有进程都挂起时, 系统陷入死锁. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219770,
			"title": "在虚存系统中, 只要磁盘空间无限大, 作业就能拥有任意大的编址空间. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219771,
			"title": "同一文件系统中不允许文件同名, 否则会引起混乱. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219772,
			"title": "优先数是进程调度的重要依据, 一旦确定不能改变. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219773,
			"title": "一旦出现死锁, 所有进程都不能运行. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:14",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		}
	]
}